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Quoting: 50BS12 7/8 Martin — Roller Chain Sprocket; 7/8" Bore; 50 Chain; 12 Teeth; 1 Row of Teeth; No Hardened Teeth; 2.708" Outside Diameter; 2.415" Pitch Diameter; B-Hub One Side; Finished Bore Mount; No Bushing; 5/8" Chain Pitch; ANSI Roller Chain; Keyway; Steel Material 50FB12 x 7/8
For immediate line-down emergencies, call 915-845-8188.